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(No Model.) 3 Sheets-Sheet 1' M. WHELESS. ELECTRIC ARC LAMP.

No. 548,683. Patented 0015.29, 1895.

ANDREW lGRMlAM. PNUTO-UYND.WASNINGTUN,D.C.

(No Model.) 3 SheetsSheet 2.

M. WHELESS. ELEGTRIG ARC LAMP.

No. 548,683. Patented O0t.29,189 5.

WWIIIIIIIIIIIIIIII AN DREW BJIRAHAM. PHOT0'UI'HU.WASHIN GTOH. DC.

3 Sheets-Sheet 3.

(No Model.)

M. WHELESS. ELEUTRIU ARC LAMP- No. 548,683. Patented Oct. 29, 1895.

.Borra Cameo I, T377 W,

AIIDIIW IfilAnAM.PHDTO'UI'HQWASNINGTON. EC.

"UNITED STATES PATENT Grates.

MALONE WHELESS, OF WASHINGTON, DISTRICT OF COLUMBIA.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 548,68 3, dated October29, 1895.

Application filed June 8, 1895- Serial No. 552,159. (No model.)

To aZZ whom it may concern:

Be it known that I, MALONE WHELnss, a citizen of the United States,residing at Washington, in the District of Columbia, have inventedcertain new and usefullmprovements in Electric Lamps; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to an improvement in electric-arc lamps, moreespecially to such a lamp as is shown in my applications for UnitedStates patents filed April 27, 1895, Serial Nos. 547,393 and 547,394.The present construction illustrates the principles which are containedin such applications; but the present case shows the lamp insubstantially the completed form, in which it will be made and put intouse.

The invention consists in the details of construction hereinafterpointed out and claimed.

In the annexed drawings, Figure 1 represents an elevation of the entiredevice. Fig. 2 represents a detailed view of the counterweight. Fig. 3represents a vertical diametric section through one of the mainsolenoids. Fig. t represents a partial transverse diametric View and ahorizontal diametric view of the core of the solenoid. Fig. 5 representsa top view of the negative-carbon holder. Fig. 6 represents severalviews of the cut-out. Fig. 7 represents an enlarged transverse view ofthe same. Fig. 8 represents a diagrammatic view of the wiring.

In the drawings, the letter A represents the light-chamber, which issecured in the usual way to the cap 13, provided with the top centralhollow boss b. Passing down through and secured firmly within this bossI) is the positive-carbon holder 0, containing the positive carbon D.\Vithin the light-chamber A this positive-carbon holder G is made nearits lower end 0 with opposite slots 0. Secured to the carbon-holder G atthese slots 0' is a band E. In the ears e of this band E are pivoted thegrip-cams F, whose operative edges pass through the slots 0' and restagainst the positive carbon D. The outer ends'of these cams F arepivoted to hangers f, whose upper endsf are pivoted in a yoke G. Thisyoke G is secured to a sleeve g, which loosely surrounds thepositive-carbon holder 0. This yoke G is secured by nuts above and belowit, at it ends, to rods h. The counterweight G is pivoted by its arms 9to each sideof the yoke G, such counterweightbeing also pivoted by thelugs g to the brackets 9 depending from the cap B. This counterweightand the brackets are shown in dotted lines in Fig. 1, so as not toconfuse the drawings.

The rods h pass through the cap B, through tubes h, and are secured tothe cores H of the main solenoids I. These cores II are made of a numberof vertical rods 7L2, held together by caps h as clearly shown in Fig.4. Secured to the supports of the main solenoids is a plate L, on top ofwhich is placed a small solenoid Z. To the under side of the plate L issecured a bracket Z, in which is pivoted the lever M, which forms onepart of the cut-out. At the end of this lever M is made a head m,consisting of the several layers m m m m consisting, in order, of redfiber, metal, red fiber, and metal, secured together by the bolts mSecured to the under side of the metal plate m is the carbon contact mSupporting-rods n depend from the plate L and carry the other portion Nof the cut-out. This consists of the fiber plate n and metal plate nheld together by bolts m and this part N carries the other carboncontact a Insulated to the cap B is the binding-post O to thenegative-carbon holder. This consists of rods 0 and 0', held together bythe tube 0 and the negative-carbon clamp P. This clampP has two jaws 19and p. The jaw 19' is held by the sleeve 19 upon a horizontal rod 19which is held in the lower end of the rod 0. Rising from the other end19 of this rod 19 is the bar 19 in which is a setscrew 19 andasteady-pin p". The inner ends of the set-screw p and the steady-pin 19engage the rear face of the jaw 19. Between the two jaws p and p thenegative carbon Q is held, and it is clamped between the two jaws byoperating the set-screw 19 the steadypin 19 preventing the jaw p fromturning.

On the top of the cap B is placed the positive binding-screw b, and inthe cap B is made the usual safety-valve R.

The solenoids I are made of coarse and fine wire, as clearly indicatedin Fig. 3, the. Wires being Wound in reverse directions.

The line-wire is connected with one solenoid I and to the lever M of thecut-out. The positive wire passes from the first solenoid I to thesecond solenoid I, thence to the small solenoid Z, and thence to thepositive bindingscrew 1). From the part N of the out-out the negativewire passes to the binding-screw O, and from this binding-screw thenegative Wire passes off to the line.

When the current is turned on, the three solenoids I, I, and Z arevitalized. The two solenoids I operate in the usual way by thedifference in the electromotive force produced by the differentiationbetween the reverse currents passing through the coarse and finewindings. The cores II are acted upon by the solenoids and through theyoke Gr and cams F act upon the positive carbon D. While the lamp is inuse, the solenoid Z is aetive and keeps open the cut-out M N. Should thelamp from any cause become inactive, the

assess solenoid Z becomes devitalized, the two parts M N contact, andthe current passes around the lamp.

Having described my invention, what I claim is 1. The combination of theyoke, G; the cap, B, and the counter-weight, G; the counterweight beingpivoted both to the cap and the yoke, as set forth;

2. The combination of the jaws, p, p; the latter having the sleeve 19the rod,p the bar, 19 the set screw, 19, and the steady pin, 19 as setforth.

3. The lever, M, having the head, 0%, consisting of the several layers,m m m and m consisting in order of red fiber, metal, red fiber andmetal, and the bolts, m, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

MALONE WHELESS.

Witnesses:

ROBT. V. HUGHES, A. E. BELL.

